Spindle brake



Nov. 3, 1953 J. A. KoolsTRA SPINDLE BRAKE 2 Sheets-Sheet l Filed Jan. 3, 1952 lzveiaorf:

Nov. 3, 1953 Y J. A. KQQIISTRAV 2,65'13523 SPINDLE BRAKE Filed Jan. 3, 1952 2 Sheets-Sheexl 2 Patented Nov. 3, 1,953

SPINDLE BRAKE John A. Kooistra, North Andover, Mass.,y assigner to Davis & Furber Machine Company, North Andover, Mass.,`.a corporation of Massachusetts Application January 3, 1952, Serial No. 264,800

4 Claims.

'I'his invention relates to mechanism for braking or stopping the rotation of a spindle in a spinning frame or the like. In the operation of such textile machines as spinning frames where a large number of rotating spindles are employed each carrying a yarn receiver upon which the yarn is wound it is frequently necessary to stop the rotation of a single spindle. This occurs principally when the yarn running to the spindle breaks and the operator has to locate the ends of the broken yarn and piece them together.

Great diii'iculty has been experienced in providing practical and eiiicient means for thus stopping the rotation of a single spindle in such a machine while the other spindles continue to rotate and to maintain the spindle quiescent until the operator has located and pieced the broken ends. This difficulty has been greatly increased in recent times for two reasons, rst, such spindles are now run atsuch high speed that it is ydifficult and in fact dangerous for an operator to grasp the running wound bobbin, or other yarn receiver, on the spindle and hold it. Not infrequently operators lingers are burnt in so doing. Second, the expense of bobbins heretofore generally employed has become such that the yarn receivers employed are quite largely made of paper, or similar material, irin the form of tubes or cops, and while running are held firmly pressed in engagement with a, support rotating with the n spindleblade so that it is impractical to raise the yarn receiver or separate it from the spindle while running.

The present invention has for its object to provide a simple, efficient and practical braking mechanism in which the entire spindle assembly, which comprises the spindle blade, the whorl by which it is driven, and the yarn receiver support to which the yarn receiver is firmly pressed, is held against rotation and preferably raisedbodily whenever it is desired to stop its rotation and hold it quiescent.

The object of the invention is further to provide such a means in which the braking action takes place symmetrically with respect to the spindle assembly and does not apply any force radially of the spindle blade which would act to interfere with its normal alinement.

The object of the invention is further to provide such a mechanism which may readily be operated either directly by the hand or by any other suitable means.

These and other objects and features of the invention will appear more fully from the accompanying description and drawings and aredefined in the claims.

The drawings illustrate but a single spindleV unit as applied to a standard type of spinning.

Fig. l is a view, chiefly in vertical cross sec'Y tion, of an entire unit embodying a preferred form of the invention;

Fig. 2 is a view in horizontal cross section takenA on the line 2--2 of Fig. 1; Y

Fig. 3 is a side elevation, partially in vertical cross section on an enlarged scale, of a portion of the construction shown in Fig. 1;

Fig. 4 is a bottom View in perspective of the lifter brake element; Y

Fig. 5 is a top view in perspective of the actuator element; and,

Fig. 6 is a top view in perspective of the top of the base element with three Figures 4, 5, and 6 shown in alinement.

The member I represents that portion of the machine in which the spinning unit is mounted.

VThe spinning assembly is shown as comprising the spindle blade 2, a whorl 3 rmly secured thereto and driven in the usual manner by a belt and a yarn receiver support 4 firmly secured to.

the spindle blade and whorl. This support is shown as of generally conical form at its base and at its head portion 5 split longitudinally land diametrically at 6v. The yarn receiver is shown as a heavy paper cop or tube 1 which is forced.

over the support with its lower end in iirm engagement with the base of the support and its,v

upper end clamped by the split head 5 of the support. It will thus be seenthat the entire assembly forms a rigid unit and that the yarn receiver is firmly secured to this assembly.

The spindle .assembly is mounted in any usual form of base. This base is shown as having a horizontal head plate 8 resting onthe member I with a vertical socket II extending downward from the head 8 and passing through the member I with the base locked in place by the nut I2.

The base also extends upward as a cylindrical sleeve I3 within and concentrically of the whorl. The spindle blade extends down into the socket and is seated in the usual manner at its lower end I4. A suitable antifriction bearing I5 is interposed between the spindle blade and the cylindrical portion I3 of the base. l

One or more, herein shown as tWo, vertical pins I6 extend upward from the head 8 of the base. A member, herein referred to as the lifter brake, is mounted for vertical movement on these pins and is held thereby against rotation with respect to the base. This lifter brake I1 is mounted concentrically of the spindle blade beneath and normally out of engagement with the whorl, as shown in Fig. 1. In its preferred construction its upper surface I8 is of conical shape and a similar conical shaped surface I9 is opposed to it on the bottom of the whorl. One or both of these surfaces is faced with any suitable braking composition and for that purpose the entire lifter brake member I1 has been found highly satisfactory when made of Bakelite.

In order to effect the desired braking action and stop the rotation of the spindle this lifter brake member is raised until it engages the whorl and locks it against rotation and preferably'raises the entire spindle assembly slightly.

The lpreferred means for thus lifting the lifter brake and effecting the braking action is provided by an element herein termed a brake actuator shown separately in Fig. 5. This brake actuator is mounted upon the base head 8 concentrically of the spindle blade 'beneath the lifter brake and is provided with concentric slots `2I ntting over the pins I6 so that it may be given a partial rotation of and concentric-ally with vrespeci; to the spindle assembly.

The aperture in the actuator also nts 4over .the sleeve I3 of the base. In order to secure the required lifting motion vthis actuator is shown as provided with cam elements I"22 cooperating Iwith cam elements '23 formed in the bottom of the lifter brake. iIt will `thus be seen that by rotating the actuator the lifter brak-e is raised to effect the braking action. This partial rotation of the actuator may be given by means of a handle 2d extending therefrom and this handle maybe :operated manually or by any suitable connection thereto.

In order to limit and prevent undue upward movement of the spindle assembly and assist in the braking action a retainer is secured to the base head 8 by the screws "9 and extends over an upper surf-ace of the whorl. This retainer is shown as a ring-like member 25 secured "to the base and having an inturned iiange v26 extending above the upper surface :27 of the base of the whorl. The lov/er surface of `the `iiange 26is also preferably provided with a suitable 'braking composition 28. Y

It will thus vbe seen that Aa very simple and efncient braking mechanism is provided by 'which the entire spindle assembly, simply by partially rotating the actuator, is 'locked against rotation and preferably raised bodily into engagement with the retainer and thus held free from rotation as long as may be desired with the belt slipping on the whorl and then returned to running position by reverse rotation of the actuator.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

l. In a spinning frame'or the like, a spindle Vassembly comprising a spindle blade and a whorl and a yarn receiver support both secured to the spindle blade, a fixedly mounted base for the spindle blade extending within and concentrical- 1y of the WhOl, 'a lifter brake vertically moveable and non-rotatable with respect to the base mounted concentrically of the spindle blade beneath and normally out of engagement with the whorl, and means for raising the lifter brake to engage the whorl and hold the spindle assembly against rotation. y n

2. In a spinning frame or the iike, a spindle assembly comprising a spindle Vblade and a whorl and a yarn receiver support both secured to the spindle blade, a ixedly mounted base for the spindle blade extending within and concentrically of the whorl, a lifter brake vertically moveable and non-rotatable with respect to the base mounted concentrically of the spindle blade beneath and normally out of engagement with the whorl, and a brake actuator mounted upon ythe base concentrically of the spindle blade beneath the lifter brake, cooperating cam elements `upon the actuator and the lifter brake acting when the actuator is given a partial rotation to raise Athe lifter brake into engagement with the `whorl and hold the spindle assembly against rotation.

3. The construction defined in eiai-m ltogether with `a retainer secured to the base extending over and spaced from an upper surface of the whorl and acting to limit upward movement of the spindle assembly bythe lifter bra-ke and assist in the braking action.

4. The construction defined in claim 2 together with a retainer secured to the Vbase extending over and spaced from an upper surface of the whorl and acting to limit upward movement of the spindle assembly by the 'lifter brake and assist in the braking action.

JOHN A. KGOISTRA.

References Cited in 'the iile of this patent UNITED STATES PATENTS 

